SUPEREFFICIENT Antonyms

• not in action or at work

• the state of an engine or other mechanism that is idling

• without a basis in reason or fact

• not in active use

• silly or trivial

• lacking a sense of restraint or responsibility

• not yielding a return

• not having a job

• run disconnected or idle

• be idle; exist in a changeless situation

• not producing an intended effect

• lacking in power or forcefulness

• lacking the ability or skill to perform effectively; inadequate

• not producing desired results; wasteful

• lacking the ability or skill to perform effectively; inadequate

• lacking spirit or liveliness

• idle or indolent especially in a dreamy way

• moving slowly and gently

• disinclined to work or exertion

• deficient in alertness or activity

• characterized by neglect and undue lack of concern

• dust consisting of a mixture of small coal fragments and coal dust and dirt that sifts out when coal is passed over a sieve

• a noticeable deterioration in performance or quality

• a stretch of water without current or movement

• a soft wet area of low-lying land that sinks underfoot

• the quality of being loose (not taut)

• a cord or rope or cable that is hanging loosely

• not tense or taut

• flowing with little speed as e.g. at the turning of the tide

• lacking in rigor or strictness

• avoid responsibilities and work, be idle

• be inattentive to, or neglect

• release tension on

• make less active or fast

• become slow or slower

• make less active or intense

• become less in amount or intensity

• cause to heat and crumble by treatment with water

• disinclined to work or exertion

• not moving quickly; taking a comparatively long time

• at a slow tempo

• (used of timepieces) indicating a time earlier than the correct time

• without speed (`slow' is sometimes used informally for `slowly')

• showing a time that is earlier than the actual time

• slow to learn or understand; lacking intellectual acuity

• so lacking in interest as to cause mental weariness

• (of business) not active or brisk

• lose velocity; move more slowly

• become slow or slower

• cause to proceed more slowly

• slow or slothful

• (of business) not active or brisk

• slow and apathetic

• not producing or capable of producing

• not producing desired results

• not characteristic of or befitting a profession or one engaged in a profession

• tending to squander and waste

• inefficient in use of time and effort and materials

• laying waste

• Worse than optimal.